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  • get/api/v1/parseParse a natural-language date query and answer it
  • get/api/v1/addDate N calendar days after a date
  • get/api/v1/subtractDate N calendar days before a date
  • get/api/v1/diffSigned whole days between two dates (exclusive)
  • get/api/v1/business-daysBusiness days between two dates, or the date N business days from a date
  • get/api/v1/invoice-dueInvoice due date from net payment terms
  • get/api/v1/next-occurrenceNext occurrence of a tracked event or weekday, strictly after the base date
  • get/api/v1/holidaysObserved public holidays for a jurisdiction and year
  • get/api/v1/explainFull receipt plus human-readable derivation steps for any operation
  • get/oembedoEmbed provider for days-until pages
  • get/badge/days-until/{target}.svgDynamic SVG countdown badge
TI

tilwhen date API

Date arithmetic: add, subtract, diff, business days, holidays, with auditable receipts

11 operations·6 schemas·1 revision

Changes

Full history

Source

View schema
Spec
OpenAPI 3.1.0
Document
tilwhen.com · JSON, 24 KB
Retrieved
Oct 20, 2026, 09:39 UTC
Digest
73e321edeaaa

For agents

Every page here has a markdown twin. The overview is one fetch; the llms.txt lists every operation with a link to its own markdown.

curl https://skmtc.dev/tilwhen/apis/tilwhen-date-api.md
curl https://skmtc.dev/tilwhen/apis/tilwhen-date-api/llms.txt